In reply to John Workman:
CORRECT. In that case you should use it the "wrong" way round, or instead use e.g. DMM Ceros (as others suggest).
This issue exists with GriGri and several krabs including belay specific ones like DMM belay master, Mammut Smart HMS, etc, etc.
Any piece of crucial kit, be it Grigri or anything else... you need to try it out with whatever krabs etc you normally use, do your best to get it to sit in a bad position or make it malfunction in some way, then see what you need to do to prevent that. I'm sorry but some judgement is required.
Checkout Youtube channel "Jann Camus Bliss Climbing", this is the exact sort of thing he does all the time with all sorts of bits of kit.